Baka to Test to Shoukanjuu

About

Based on a light novel series by Kenji Inoue with illustrations by Yui Haga.
The light novel series, which debuted in 2007, is set in a school that strictly stratifies students, and the comforts of their classrooms, by test scores. The lowest ranked class rallies to use experimental fantasy summoned monsters to battle the higher ranked classes for school supremacy.